CA2391147A1 - Filter apparatus - Google Patents
Filter apparatus Download PDFInfo
- Publication number
- CA2391147A1 CA2391147A1 CA002391147A CA2391147A CA2391147A1 CA 2391147 A1 CA2391147 A1 CA 2391147A1 CA 002391147 A CA002391147 A CA 002391147A CA 2391147 A CA2391147 A CA 2391147A CA 2391147 A1 CA2391147 A1 CA 2391147A1
- Authority
- CA
- Canada
- Prior art keywords
- vacuum
- filter
- tank
- clean liquid
- liquid tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000007788 liquid Substances 0.000 claims abstract description 81
- 238000005086 pumping Methods 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 8
- 238000013022 venting Methods 0.000 claims 3
- 238000004140 cleaning Methods 0.000 claims 2
- 238000000926 separation method Methods 0.000 claims 2
- 230000037452 priming Effects 0.000 abstract description 2
- 239000000356 contaminant Substances 0.000 description 3
- 239000012065 filter cake Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000002173 cutting fluid Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/09—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with filtering bands, e.g. movable between filtering operations
- B01D29/096—Construction of filtering bands or supporting belts, e.g. devices for centering, mounting or sealing the filtering bands or the supporting belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/605—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by level measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
- B01D29/6423—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a translational movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
- B01D29/684—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with a translatory movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/20—Pressure-related systems for filters
- B01D2201/204—Systems for applying vacuum to filters
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
A liquid filter apparatus includes a filter media belt enclosed by sealably mated cover pan and floor pan defining a vacuum chamber connected to a sealed clean liquid tank, with clean liquid pumped out continuously to draw liquid to be filtered into an upper region of the filter chamber via on inlet hose connected to a source of liquid to be filtered. The cover pan is lifted after the vacuum is relieved to allow indexing of the filter media belt. A main control valve to the clean liquid tank is closed and pumping liquid continues during indexing. A vacuum control device limits the maximum vacuum developed in the clean liquid tank and a vacuum pump removes air from the tank for priming and to eliminate excess accumulated air.
Description
4 Background of the Invention This invention concerns filtration apparatus of a type used in industrial operations 6 to remove contaminants from a liquid used during manufacturing. After machining such parts as 7 engine blocks; manifolds, it is usual to wash the parts to remove chips, grinding swarf; cutting 8 fluid residue, etc. The parts are conveyed'through an enclosed washer chamber where spray jets 9 wash off these contaminants; with the spray liquid and washed off material collected in a tank beneath the washer chamber.
11 It is necessary to remove the chips and other debris from the liquid to allow 12 continued reuse of the liquid in the washing sprays; and in the past, an inclined filter media belt 13 filter was mounted within the tank, periodically indexed to remove accumulated filtrate, the 14 liquid drawn through the filter media belt to be filtered. A drag conveyor is also periodically indexed to convey accumulated solids out of the tank for disposal. See U:S.
patent 6,042,726 for 16 an example of such a filter.
17 In this arrangement; the filter apparatus is difficult to service, as the belts and 18 conveyor are enclosed within the washer collector tank.
19 In some versions, the feeding of disposable media over the belt to remove fine particles would require access to the rear of the tank, which is often difficult in many 21 installations.
22 To pump the contaminated liquid to an external filter would require a separate 23 tank to receive the liquid in order to allow belt indexing, increasing the floor space and cost of 24 the equipment required.
r 1 This situation is also presented with other stand alone equipment such as 2 individual grinders and other machine tools having a dedicated chip cutting fluid collection tanks 3 below the machining zone:
11 It is necessary to remove the chips and other debris from the liquid to allow 12 continued reuse of the liquid in the washing sprays; and in the past, an inclined filter media belt 13 filter was mounted within the tank, periodically indexed to remove accumulated filtrate, the 14 liquid drawn through the filter media belt to be filtered. A drag conveyor is also periodically indexed to convey accumulated solids out of the tank for disposal. See U:S.
patent 6,042,726 for 16 an example of such a filter.
17 In this arrangement; the filter apparatus is difficult to service, as the belts and 18 conveyor are enclosed within the washer collector tank.
19 In some versions, the feeding of disposable media over the belt to remove fine particles would require access to the rear of the tank, which is often difficult in many 21 installations.
22 To pump the contaminated liquid to an external filter would require a separate 23 tank to receive the liquid in order to allow belt indexing, increasing the floor space and cost of 24 the equipment required.
r 1 This situation is also presented with other stand alone equipment such as 2 individual grinders and other machine tools having a dedicated chip cutting fluid collection tanks 3 below the machining zone:
4 It is the object of the present invention to provide a filter apparatus for removing contaminants received in a tank such as a washer collection tank or other equipment; which 6 apparatus is not necessary to be disposed within the tank and does not itself require a separate 7 collection tank and which can quickly cant' out the periodic indexing of a filter media belt to 8 clean solids therefrom.
Summar~of the Invention 11 The above recited object; and others which will be understood upon a reading of 12 the following specification and claims are achieved by a filter apparatus mounted above a clean 13 tank. A downwardly facing upper pan is movable relative a floor pan to bring a perimeter flange 14 into engagement with a hose seal disposed on the lower pan to create a sealed filter chamber. A
vacuum box is mounted below the lower floor pan and-connected to the clean-tank by a piping 16 connection to transfer fluid to a clean tank; the piping extending out from one side of the vacuum 17 box, down to the level of the clean tank and bask into one side of the clean tank. The piping 18 connection has a main control valve located along the length of the fluid connection.
19 A pump is connected to the clean tank for pumping filtered liquid back to the utilizing equipment, which pumping generates-a negative pressure in the clean tank (and also the 21 vacuum box). , 22 A filter belt Loop has an upper segment extending into the filter chamber over one 1 segment of the hose seal which extends entirely around the filter chamber and onto a perforated 2 plate supported ona set of elongated bars fixed on the lower pan; and out of the filter chamber 3 over another segment of the hose seal.
4 A vacuum pump is provided to evacuate air from the tank to prime liquid flow S drawn into an inlet pipe connected to the upper pan and extending into the collecting tank 6 containing the liquid to be filtered: Upon opening of the control valve;
liquid is drawn into the 7 vacuum chamber, passing through the filter belt and into the vacuum box and thence into the 8 clean tank.
9 To index the belt to clean-accumulated solids, a vacuum breaker valve is opened to allow air into the filter chamber to relieve the vacuum, and drain the dirty liquid from the filter 11 chamber. The main control valve is hereafter closed: A power cylinder lifts he upper pan from 12 the hose seal to allow the filter media belt to be advanced to carry the belt segment on which the 13 solids have accumulated out of the chamber to be'discharged:
14 The recirculation pump continues to be operated during indexing to insure an uninterrupted supply of clean liquid and to maintain a vacuum in the clean tank: The vacuum 16 level increases during pumping,to a predetermined'maximum level, with an air bleed vacuum 17 control device introducing air into the clean tank when the maximum vacuum is reached to 18 prevent an excessive vacuum level from developing.which could interfere with the pumping of 19 clean liquid out of the tank.
Upon reopening the main control valve, liquid to be filtered- is again quickly 21 drawn into the vacuum chamber, through the filter belt and into the clean tank via the vacuum 22 box.
1 The vacuum pump is operated as necessary to eliminate excess air until a 2 predetermined liquid level is restored in the tank sensed by a-liquid level switch.
4 Description of the Drawings -Figure 1 is a diagrammatic representation of the filter apparatus according to the 6 present invention.
7 ' Figure 1A is an enlarged view of a portion of the filter apparatus shown in Figure 8 1 taken in the direction of the arrows A-A in Figure 1.
9 Figure 2 is a plan view of the lower. pan and related components.
Figure 2A is an enlarged sectional view of the hose seal.
11 Figure-2B is a fragmentary enlarged view of a portion of the hose seal showing 12 the end connection.
13 Figure 3 is a fragmentary enlarged longitudinal sectional view of portions of the 14 filter apparatus shown in Figure 1.;
Figure 4 is an enlarged fragmentary view of a transverse section taken across the l b cover pan and lower pan components shown in Figure 1:
18 Detailed Descrintian 19 In the following detailed description, certain specific terminology will be employed for the sakeof clarity and-a particular embodiment described in accordance with the 21 requirements of 35 USC l F2, but it'is to be understood that the same is not intended to be 22 limiting and should not be so construed inasmuch as the invention is capable of taking many 1 forms and variations within the scope of the, appended claims.
2 Referring to the drawings, Figure l shows the filter apparatus according to the 3 present invention, which includes a clean liquid tank 12, and a recirculating filter media belt 14 4 disposed within an enclosure 16 affixed atop the clean tank liquid tank 12:
An inlet hose 18 is connected to an inlet pipe 20 extending down into a collection 6 tank 22 for receiving liquid to be filtered, as =from a parts washer:
7 The clean tank l2 could itself also be received inside the collection tank 22 which 8 would typically be of much larger volume.
9 The inlet hose 18 is connected to a rotatable inlet fitting 24 affixed to the top of a cover pan 26 so as to be in communication with a vacuum filter chamber 28 defined between the 11 inside the cover pan 26 and a floor pan 30;
12 The rectangular cover pan 26 has an outwardly projecting perimeter flange 13 which overlies a hose seal 34 resting on the upper surface of the floor pan 30 and coextensive 14 with the flange 30.
The hose eal 34 comprises a length of distensible elastomeric sealed tube 36 16 filled with a liquid 38 (Figure 2Bj and having its ends connected with a coupling 40 (Figure 2B) 17 so as to define a sealed closed vessel. The hose seal 34 can accommodate misalignments of the 18 flange 32 such as caused by tilting of the cover pan 26 since pressure on one portion will force 19 liquid to another portion to expand the tube 36 to fill any gaps.
The cover pan 26 is mounted for guided up and down movement by actuation of a 21 power cylinder 40 having a rod 42 pinned to a clevis 44 affixed to the top of the cover pan 26.
22 Two slotted front tabs 46 and rear abs 48::having shorter slots are welded to the front and rear 1 corners respectively of the cover pan 26.
2 Guide pins 50 are fixed to extend into the slotted tabs 4b, 48 to limit upward 3 travel and to guide movement of the cover pan 26; with side rollers 'S2.
Rollers 52 on the tab 4 sides locate the cover pam 26 side to side (Figure 1 A).
The cover,pan 26 is tilted by the affect of the unequal slots when the cover pan 26 6 is raised; causing it to be higher at the discharge end o allow the filter cake to pass out when the 7 filter media belt 58 is indexed.
8 The floor pan 30 has a series of spaced apart parallel bars 54 overlain with a 9 perforated plate 56 to define a support for a permanent media belt 58 extending through the vacuum chamber 28 atop the perforated plate 56. The bars 54 and the perforations in the plates 11 provide openings allowing flow through the filter belt 58 and through the perforated plate 56.
12 The permanent media belt 58 has ends connected' o form a loop driven by a shaft mounted 13 reducer 60 around an idler roller 62 when an index cycle is initiated, the return segment thereof 14 passing beneath the floor pan 30.
A vacuum box 64 is mounted below an opening in the floor pan 30; connected to 16 a pipe connection 66 extending to one side of the enclosure 16 and into the upper end of the 17 clean tank 12, a main control valve 68 installed therein to open or close fluid communication 18 between the vacuum box 64 and the clean tank 1.2.
19 A disposable media roll 70 may be mounted below the enclosure 16 and fed onto the permanent media belt 58 (started by use of pull bars in the well known manner). Such 21 disposable media can be used depending on the nature of the solids to be filtered out to prevent 22 rapid clogging of the permanent media belt 58 by very fine-particles.
1 When indexed, the permanent media belt 58 is advanced to dump accumulated 2 filter cake out to a receptacle 72:
3 A rotary beater brush 74 may also be provided to aid in dislodging the solids, and 4 an array of spray nozzles 76 receiving clean liquid under pressure forms jets directed at the inside of the belt 58 at the other end cleans the entrapped particles. A sloping floor 78 of the enclosure 6 16 collects the spray liquid and dislodged olids directs;the same to a drain 80.
7 A main pump 82 is connected to the lower level of the clean tank 12 to return 8 clean liquid to the washer or other utilizing equipment: (not Shawn).
9 A vacuum is developed in the clean tank i2 as the liquid is pumped out to cause liquid to be filtered to be drawn up the draw pipe 20 into chamber 28; through the belt 58 (and 11 disposable media if used), into the vacuum box 64 and connection 66, and into the clean liquid 12 tank 12. The pump 82 is continuously operated to supply clean liquid to the utilizing equipment.
I 3 Due to the vacuum condition in the chamber 28, a large downward pressure force I 4 is exerted on the cover pan 26, compressing he hose seal 34 beneath the flange 32 to insure a complete seal.
16 A vacuumpump 84 is also coruiected to the upper region of the clean tank 12 to 17 be able to evacuate air until a predetermined liquid level is reached sensed by a liquid level 18 switch 90: This is done to prime the system; at start up to speed filling of the tank 12 with liquid 19 at that time.
The vacuum pump 84 also can eliminate entrained air in the liquid accumulating 21 in the upper region of the tank 12.
22 In order to carry out an indexing of the media belt 58, a vacuum breaker valve 86 1 is connected to the fitting 24 to allow air to enter the system and eliminate the vacuum condition.
2 The liquid in the inlet hose 18 will then llow back down into the tanl~c 22.
3 When the vacuum is relieved as sensed by a vacuum switch 88; the control 'valve 4 68 is immediately operated by the apparatus controls (not shown) to be closed.
The cover pan 26 can then be raised and the belt 58 advanced to carry the segment 6 thereof which was in the chamber 28 out of the chamber to position afresh segment atop the 7 perforated plate 56.
8 In the meantime, the pump 82 has continued to draw clean liquid from the tank 9 12, increasing he vacuum level therein.
A vacuum control device 88 limits the vacuum level to a predetermined maximum 11 ( 12" hg) which allows the pump 82 to continue pumping: smoothly.
12 The indexing cycle can be completed in a short time, i:e:, 30 seconds at a belt 13 speed of 40 ffilminute, and the tank 12 should be sized to allow clean liquid to be continuously 14 pumped during that interval:
After the cover pan 26 is again lowered, vacuum breaker valve 86 closed and 16 control valve 68 reopened, liquid is again drawn into inlet hose 18 and is collected in the clean 17 tank 12 after passing through the filter chamber 28.
18 The vacuum pump 84 is operated to eliminate excess air until liquidrises to a 19 maximum level, sensed by a liquid level switch 9U.
Thus, a filter apparatus has been provided which is located above the arks and is 21 thus readily accessible for service.
22 A rapid priming and indexing is enabled to minimize the filter downtime to reduce the capacity required for a given installation.
Summar~of the Invention 11 The above recited object; and others which will be understood upon a reading of 12 the following specification and claims are achieved by a filter apparatus mounted above a clean 13 tank. A downwardly facing upper pan is movable relative a floor pan to bring a perimeter flange 14 into engagement with a hose seal disposed on the lower pan to create a sealed filter chamber. A
vacuum box is mounted below the lower floor pan and-connected to the clean-tank by a piping 16 connection to transfer fluid to a clean tank; the piping extending out from one side of the vacuum 17 box, down to the level of the clean tank and bask into one side of the clean tank. The piping 18 connection has a main control valve located along the length of the fluid connection.
19 A pump is connected to the clean tank for pumping filtered liquid back to the utilizing equipment, which pumping generates-a negative pressure in the clean tank (and also the 21 vacuum box). , 22 A filter belt Loop has an upper segment extending into the filter chamber over one 1 segment of the hose seal which extends entirely around the filter chamber and onto a perforated 2 plate supported ona set of elongated bars fixed on the lower pan; and out of the filter chamber 3 over another segment of the hose seal.
4 A vacuum pump is provided to evacuate air from the tank to prime liquid flow S drawn into an inlet pipe connected to the upper pan and extending into the collecting tank 6 containing the liquid to be filtered: Upon opening of the control valve;
liquid is drawn into the 7 vacuum chamber, passing through the filter belt and into the vacuum box and thence into the 8 clean tank.
9 To index the belt to clean-accumulated solids, a vacuum breaker valve is opened to allow air into the filter chamber to relieve the vacuum, and drain the dirty liquid from the filter 11 chamber. The main control valve is hereafter closed: A power cylinder lifts he upper pan from 12 the hose seal to allow the filter media belt to be advanced to carry the belt segment on which the 13 solids have accumulated out of the chamber to be'discharged:
14 The recirculation pump continues to be operated during indexing to insure an uninterrupted supply of clean liquid and to maintain a vacuum in the clean tank: The vacuum 16 level increases during pumping,to a predetermined'maximum level, with an air bleed vacuum 17 control device introducing air into the clean tank when the maximum vacuum is reached to 18 prevent an excessive vacuum level from developing.which could interfere with the pumping of 19 clean liquid out of the tank.
Upon reopening the main control valve, liquid to be filtered- is again quickly 21 drawn into the vacuum chamber, through the filter belt and into the clean tank via the vacuum 22 box.
1 The vacuum pump is operated as necessary to eliminate excess air until a 2 predetermined liquid level is restored in the tank sensed by a-liquid level switch.
4 Description of the Drawings -Figure 1 is a diagrammatic representation of the filter apparatus according to the 6 present invention.
7 ' Figure 1A is an enlarged view of a portion of the filter apparatus shown in Figure 8 1 taken in the direction of the arrows A-A in Figure 1.
9 Figure 2 is a plan view of the lower. pan and related components.
Figure 2A is an enlarged sectional view of the hose seal.
11 Figure-2B is a fragmentary enlarged view of a portion of the hose seal showing 12 the end connection.
13 Figure 3 is a fragmentary enlarged longitudinal sectional view of portions of the 14 filter apparatus shown in Figure 1.;
Figure 4 is an enlarged fragmentary view of a transverse section taken across the l b cover pan and lower pan components shown in Figure 1:
18 Detailed Descrintian 19 In the following detailed description, certain specific terminology will be employed for the sakeof clarity and-a particular embodiment described in accordance with the 21 requirements of 35 USC l F2, but it'is to be understood that the same is not intended to be 22 limiting and should not be so construed inasmuch as the invention is capable of taking many 1 forms and variations within the scope of the, appended claims.
2 Referring to the drawings, Figure l shows the filter apparatus according to the 3 present invention, which includes a clean liquid tank 12, and a recirculating filter media belt 14 4 disposed within an enclosure 16 affixed atop the clean tank liquid tank 12:
An inlet hose 18 is connected to an inlet pipe 20 extending down into a collection 6 tank 22 for receiving liquid to be filtered, as =from a parts washer:
7 The clean tank l2 could itself also be received inside the collection tank 22 which 8 would typically be of much larger volume.
9 The inlet hose 18 is connected to a rotatable inlet fitting 24 affixed to the top of a cover pan 26 so as to be in communication with a vacuum filter chamber 28 defined between the 11 inside the cover pan 26 and a floor pan 30;
12 The rectangular cover pan 26 has an outwardly projecting perimeter flange 13 which overlies a hose seal 34 resting on the upper surface of the floor pan 30 and coextensive 14 with the flange 30.
The hose eal 34 comprises a length of distensible elastomeric sealed tube 36 16 filled with a liquid 38 (Figure 2Bj and having its ends connected with a coupling 40 (Figure 2B) 17 so as to define a sealed closed vessel. The hose seal 34 can accommodate misalignments of the 18 flange 32 such as caused by tilting of the cover pan 26 since pressure on one portion will force 19 liquid to another portion to expand the tube 36 to fill any gaps.
The cover pan 26 is mounted for guided up and down movement by actuation of a 21 power cylinder 40 having a rod 42 pinned to a clevis 44 affixed to the top of the cover pan 26.
22 Two slotted front tabs 46 and rear abs 48::having shorter slots are welded to the front and rear 1 corners respectively of the cover pan 26.
2 Guide pins 50 are fixed to extend into the slotted tabs 4b, 48 to limit upward 3 travel and to guide movement of the cover pan 26; with side rollers 'S2.
Rollers 52 on the tab 4 sides locate the cover pam 26 side to side (Figure 1 A).
The cover,pan 26 is tilted by the affect of the unequal slots when the cover pan 26 6 is raised; causing it to be higher at the discharge end o allow the filter cake to pass out when the 7 filter media belt 58 is indexed.
8 The floor pan 30 has a series of spaced apart parallel bars 54 overlain with a 9 perforated plate 56 to define a support for a permanent media belt 58 extending through the vacuum chamber 28 atop the perforated plate 56. The bars 54 and the perforations in the plates 11 provide openings allowing flow through the filter belt 58 and through the perforated plate 56.
12 The permanent media belt 58 has ends connected' o form a loop driven by a shaft mounted 13 reducer 60 around an idler roller 62 when an index cycle is initiated, the return segment thereof 14 passing beneath the floor pan 30.
A vacuum box 64 is mounted below an opening in the floor pan 30; connected to 16 a pipe connection 66 extending to one side of the enclosure 16 and into the upper end of the 17 clean tank 12, a main control valve 68 installed therein to open or close fluid communication 18 between the vacuum box 64 and the clean tank 1.2.
19 A disposable media roll 70 may be mounted below the enclosure 16 and fed onto the permanent media belt 58 (started by use of pull bars in the well known manner). Such 21 disposable media can be used depending on the nature of the solids to be filtered out to prevent 22 rapid clogging of the permanent media belt 58 by very fine-particles.
1 When indexed, the permanent media belt 58 is advanced to dump accumulated 2 filter cake out to a receptacle 72:
3 A rotary beater brush 74 may also be provided to aid in dislodging the solids, and 4 an array of spray nozzles 76 receiving clean liquid under pressure forms jets directed at the inside of the belt 58 at the other end cleans the entrapped particles. A sloping floor 78 of the enclosure 6 16 collects the spray liquid and dislodged olids directs;the same to a drain 80.
7 A main pump 82 is connected to the lower level of the clean tank 12 to return 8 clean liquid to the washer or other utilizing equipment: (not Shawn).
9 A vacuum is developed in the clean tank i2 as the liquid is pumped out to cause liquid to be filtered to be drawn up the draw pipe 20 into chamber 28; through the belt 58 (and 11 disposable media if used), into the vacuum box 64 and connection 66, and into the clean liquid 12 tank 12. The pump 82 is continuously operated to supply clean liquid to the utilizing equipment.
I 3 Due to the vacuum condition in the chamber 28, a large downward pressure force I 4 is exerted on the cover pan 26, compressing he hose seal 34 beneath the flange 32 to insure a complete seal.
16 A vacuumpump 84 is also coruiected to the upper region of the clean tank 12 to 17 be able to evacuate air until a predetermined liquid level is reached sensed by a liquid level 18 switch 90: This is done to prime the system; at start up to speed filling of the tank 12 with liquid 19 at that time.
The vacuum pump 84 also can eliminate entrained air in the liquid accumulating 21 in the upper region of the tank 12.
22 In order to carry out an indexing of the media belt 58, a vacuum breaker valve 86 1 is connected to the fitting 24 to allow air to enter the system and eliminate the vacuum condition.
2 The liquid in the inlet hose 18 will then llow back down into the tanl~c 22.
3 When the vacuum is relieved as sensed by a vacuum switch 88; the control 'valve 4 68 is immediately operated by the apparatus controls (not shown) to be closed.
The cover pan 26 can then be raised and the belt 58 advanced to carry the segment 6 thereof which was in the chamber 28 out of the chamber to position afresh segment atop the 7 perforated plate 56.
8 In the meantime, the pump 82 has continued to draw clean liquid from the tank 9 12, increasing he vacuum level therein.
A vacuum control device 88 limits the vacuum level to a predetermined maximum 11 ( 12" hg) which allows the pump 82 to continue pumping: smoothly.
12 The indexing cycle can be completed in a short time, i:e:, 30 seconds at a belt 13 speed of 40 ffilminute, and the tank 12 should be sized to allow clean liquid to be continuously 14 pumped during that interval:
After the cover pan 26 is again lowered, vacuum breaker valve 86 closed and 16 control valve 68 reopened, liquid is again drawn into inlet hose 18 and is collected in the clean 17 tank 12 after passing through the filter chamber 28.
18 The vacuum pump 84 is operated to eliminate excess air until liquidrises to a 19 maximum level, sensed by a liquid level switch 9U.
Thus, a filter apparatus has been provided which is located above the arks and is 21 thus readily accessible for service.
22 A rapid priming and indexing is enabled to minimize the filter downtime to reduce the capacity required for a given installation.
Claims (18)
1. A filter apparatus for filtering contaminated liquid collected in a tank comprising:
a sealed clean liquid tank;
a pump connected to said tank for pumping out clean liquid from said tank;
a vacuum box with a fluid connection to said clean liquid tank;
a floor pan extending above said vacuum box, and having a fluid connection thereto;
a filter media belt extending over said floor pan, with an interposed support providing openings to allow flow through said filter media belt and into said vacuum box;
a cover pan positionable over said floor pan with a sealed relationship to define a filter chamber therebetween;
an actuator connected to allow separation of said cover pan and floor pan;
a fluid connection between said filter chamber and said tank of liquid to be cleaned;
a selectively operable control valve interposed in said fluid connection between said vacuum and said clean liquid tank to close or open communication therebetween;
a vacuum breaker valve selectively operable to allow venting of said filter chamber and separation of said cover pan and floor pan; and, an indexing drive for said advancing said filter media belt when said cover pan and floor pan are separated.
a sealed clean liquid tank;
a pump connected to said tank for pumping out clean liquid from said tank;
a vacuum box with a fluid connection to said clean liquid tank;
a floor pan extending above said vacuum box, and having a fluid connection thereto;
a filter media belt extending over said floor pan, with an interposed support providing openings to allow flow through said filter media belt and into said vacuum box;
a cover pan positionable over said floor pan with a sealed relationship to define a filter chamber therebetween;
an actuator connected to allow separation of said cover pan and floor pan;
a fluid connection between said filter chamber and said tank of liquid to be cleaned;
a selectively operable control valve interposed in said fluid connection between said vacuum and said clean liquid tank to close or open communication therebetween;
a vacuum breaker valve selectively operable to allow venting of said filter chamber and separation of said cover pan and floor pan; and, an indexing drive for said advancing said filter media belt when said cover pan and floor pan are separated.
2. The filter apparatus according to claim 1 wherein said cover pan has an outwardly projecting perimeter flange, and further including a hose seal disposed on said floor pan and comprising a sealed distensible tube filled with liquid engaged with said flange when said cover pan and floor pan are brought together.
3. The filter apparatus according to claim 1 wherein said clean liquid tank is disposed beneath said vacuum box, floor pan and cover pan.
4. The filter apparatus according to claim 3 wherein said vacuum box, floor pan, and cover pan are enclosed in a containment enclosure affixed atop said clean liquid tank.
5. The filter apparatus according to claim 4 wherein said filter media belt forms a closed loop which is circulated during indexing of said filter media belt, said enclosure having a bottom opening allowing discharge of solids from said filter media belt.
6. The filter apparatus according to claim 5 wherein said containment enclosure has a sloping bottom on an end thereof opposite said discharge opening, and further including a cleaning liquid spray nozzle directed at a segment of said filter media belt over said sloping bottom so that liquid is collected thereon, and a drain opening for allowing drainage of said collected liquid.
7. The filter apparatus according to claim 1 further including a vacuum control device connected to said clean liquid tank controllably introducing air into said clean liquid tank whenever a predetermined maximum vacuum level is reached with said control valve closed and said pump continues to pump liquid from said clean liquid tank.
8. The filter apparatus according to claim 7 further including a vacuum pump connected to said clean liquid tank operated to pump excess air out of said clean liquid tank until a predetermined liquid level therein is reached.
9. The filter apparatus according to claim 1 wherein said cover pan is mounted to be raised so as to be tilted up at the discharge end by said actuator.
10. The filter apparatus according to claim 5 further including a disposable media roll beneath said containment enclosure and fed onto said filter media belt segment extending below said floor pan to be carried over said floor pan support with said filter media belt.
11. A method of filtering liquids comprising the steps of:
arranging a segment of a filter belt loop to overlie a support having openings allowing liquid flow through said media belt;
enclosing said filter media belt and support to define a sealed filtering chamber;
connecting an enclosed region below said support to a sealed clean liquid tank;
connecting an enclosed region of said filter chamber above said: filter media belt
arranging a segment of a filter belt loop to overlie a support having openings allowing liquid flow through said media belt;
enclosing said filter media belt and support to define a sealed filtering chamber;
connecting an enclosed region below said support to a sealed clean liquid tank;
connecting an enclosed region of said filter chamber above said: filter media belt
12 to a source of a liquid to be filtered; and pumping liquid out of said sealed clean liquid tank to create a vacuum drawing liquid to be filtered into said region above said filter media belt, through said filter media belt and into said sealed clean liquid tank.
12. The method according to claim 11 wherein said step of enclosing said filter media belt and support includes the step of moving a cover onto said filter media belt and support to sealingly engage the same and define said region above said filter media belt.
12. The method according to claim 11 wherein said step of enclosing said filter media belt and support includes the step of moving a cover onto said filter media belt and support to sealingly engage the same and define said region above said filter media belt.
13. The method according to claim 12 further including the step of engaging a perimeter seal with a perimeter of said cover.
14. The method according to claim 13 further including the step of relieving the vacuum in said enclosed regions and,thereafter raising said cover, indexing a segment of said filter media belt off said support to carry accumulated solids out of said enclosed region above said filter media belt, and cleaning said solids from said segment.
15. The method according to claim 14 wherein said pumping liquid out of said clean liquid tank continues while said cover is raised and fluid communication to said clean liquid tank is blocked while said cover is raised.
16. The method according to claim 15 wherein said step of relieving said vacuum includes the step of venting said enclosure and thereafter closing communication between said enclosure and said clean liquid tank after vacuum is relieved thereby.
17. The method according to claim 15 further including the step of controllably venting said clean liquid tank when the vacuum level in said clean liquid tank reaches a predetermined maximum to limit the vacuum level developed therein.
18. The method according to claim 17 further including the step of pumping air out of said clean liquid tank until a predetermined liquid level is reached.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/906,565 US6495031B1 (en) | 2001-07-16 | 2001-07-16 | Enclosed belt filter apparatus |
| US09/906,565 | 2001-07-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2391147A1 true CA2391147A1 (en) | 2003-01-16 |
Family
ID=25422658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002391147A Abandoned CA2391147A1 (en) | 2001-07-16 | 2002-06-21 | Filter apparatus |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US6495031B1 (en) |
| EP (1) | EP1285682A1 (en) |
| CA (1) | CA2391147A1 (en) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6495031B1 (en) * | 2001-07-16 | 2002-12-17 | Jack R. Bratten | Enclosed belt filter apparatus |
| TWI239861B (en) * | 2003-10-20 | 2005-09-21 | Benq Corp | Filter screen device |
| ATE528054T1 (en) * | 2004-01-30 | 2011-10-15 | P M P O S R L | SYSTEM AND METHOD FOR TREATING A COOLING FLUID IN MECHANICAL PROCESSING PLANTS |
| US7913854B2 (en) * | 2006-03-07 | 2011-03-29 | Bratten Jack R | Filter apparatus and method with simplified filter belt indexing and sealing |
| TW200948453A (en) * | 2008-04-05 | 2009-12-01 | Flowmax Technologies Ltd | Liquid removal apparatus |
| JP2012504488A (en) * | 2008-10-02 | 2012-02-23 | グリフォン エンヴィロンメンタル，エルエルシー | Suspension liquid withdrawal apparatus and method |
| US8357292B2 (en) * | 2009-01-26 | 2013-01-22 | Crocker James P | Water treatment system for surface cleaning apparatus |
| AU2010224255B2 (en) * | 2009-03-09 | 2014-07-10 | Univenture, Inc. | Method and apparatus for separating particles from a liquid |
| EP2528452B1 (en) * | 2010-01-29 | 2015-04-22 | POET Research, Inc. | Apparatus and method for treating wet solids from a fermentation process |
| PL2629871T3 (en) * | 2010-10-22 | 2016-08-31 | Gala Inc | Filtration device |
| US10112136B2 (en) * | 2012-02-03 | 2018-10-30 | Enviro-Fab Llc | Fluid lubricant and material shavings recapture system for a cutting operation |
| US9908068B2 (en) | 2012-02-14 | 2018-03-06 | Waterblasting, Llc | Water and debris recovery system |
| US8302780B1 (en) * | 2012-02-22 | 2012-11-06 | M2 Renewables, Inc. | Industrial separator and dewatering plant |
| US9675915B1 (en) * | 2015-04-10 | 2017-06-13 | Englo, Inc. | Separator for dewatering particulate matter suspended in water |
| CA2959851A1 (en) * | 2016-03-03 | 2017-09-03 | Recover Energy Services Inc. | Gas tight shale shaker for enhanced drilling fluid recovery and drilled solids washing |
| WO2019030738A1 (en) * | 2017-08-11 | 2019-02-14 | Vahid Atharinia | Water disinfection method and apparatus |
| CN107349663A (en) * | 2017-08-31 | 2017-11-17 | 大唐环境产业集团股份有限公司 | A kind of filter cloth and adhesive tape rinse water system |
| US20200047299A1 (en) * | 2018-08-07 | 2020-02-13 | Illinois Tool Works Inc. | Coolant recapture and recirculation in material removal systems |
| US20200078894A1 (en) * | 2018-09-07 | 2020-03-12 | Manufacturing Productivity Systems | Coolant filtration system |
| IT201800010811A1 (en) * | 2018-12-05 | 2020-06-05 | Iwt Srl | Liquid waste treatment system, adapted for application in a continuous Tunnel washing machine for the Preclinical Pharmaceutical Research sector |
| CN109745750A (en) * | 2019-03-08 | 2019-05-14 | 安花萍 | A kind of agricultural environmental friend fertilizer processing equipment |
| CN113181700A (en) * | 2021-04-22 | 2021-07-30 | 安徽省冠盛纺织科技有限公司 | Self-cleaning filter screen |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1461449A1 (en) * | 1965-01-07 | 1970-12-23 | Kirch Christoph | Method and device for continuous filtration of true fluids |
| US4233157A (en) * | 1977-11-23 | 1980-11-11 | Miller Peter A | Travelling sheet, flat-bed filter apparatus and system |
| DE2816378A1 (en) * | 1978-04-15 | 1979-10-18 | Walter Dieter | METHOD AND DEVICE FOR DISCONTINUOUS VACUUM BAND FILTRATION OF LIQUIDS |
| US4664813A (en) * | 1985-09-26 | 1987-05-12 | Schneider John R | Method and apparatus for drying sludge using movable plates |
| GB2280857B (en) * | 1993-05-25 | 1995-08-09 | Peter Anthony Miller | A belt filter |
| US6495031B1 (en) * | 2001-07-16 | 2002-12-17 | Jack R. Bratten | Enclosed belt filter apparatus |
-
2001
- 2001-07-16 US US09/906,565 patent/US6495031B1/en not_active Expired - Fee Related
-
2002
- 2002-06-21 CA CA002391147A patent/CA2391147A1/en not_active Abandoned
- 2002-07-02 EP EP02014646A patent/EP1285682A1/en not_active Withdrawn
- 2002-12-16 US US10/320,733 patent/US6846421B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US6495031B1 (en) | 2002-12-17 |
| US6846421B2 (en) | 2005-01-25 |
| EP1285682A1 (en) | 2003-02-26 |
| US20030121843A1 (en) | 2003-07-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6495031B1 (en) | Enclosed belt filter apparatus | |
| US4751006A (en) | Coolant reclamation unit | |
| CA1168161A (en) | Liquid clarifier and method | |
| US3091336A (en) | Filter apparatus | |
| EP2065127B1 (en) | Coolant cleaning device for machine tool | |
| US4715964A (en) | Method for filtering contaminated liquids | |
| US6835315B2 (en) | Media vacuum filter | |
| US5059323A (en) | Self-cleaning vacuum filter with permanent, endless filter media particularly for industrial lubricating and cooling liquids | |
| US2887228A (en) | Liquid filter device | |
| US5256290A (en) | Coolant filtration unit with sludge dryer | |
| US4919825A (en) | Filter apparatus and method for separating contaminants from liquids | |
| JPH08215509A (en) | Filter medium washer in moving filter bed type filter | |
| US5008007A (en) | Apparatus for filtering industrial process liquids | |
| US3404779A (en) | Filter and sludge conveyor | |
| KR101123687B1 (en) | A Apparatus for Purifing the water | |
| JP2001089789A (en) | Method, apparatus and system of regenerating edible oil | |
| JP4094115B2 (en) | Tapping machine filtration device and grinding dust removal device | |
| KR100257025B1 (en) | Construction to moisture exclude of sludge | |
| KR20170035474A (en) | Filtering device | |
| US3585133A (en) | Up-flow self-cleaning filter apparatus | |
| CN219984108U (en) | Oil removal lifting device | |
| CN113750640B (en) | Solid-liquid separator, use method and garbage treatment equipment | |
| KR100386087B1 (en) | Slurry filtering method | |
| KR100544977B1 (en) | Fluidable waste treating apparatus | |
| KR101654770B1 (en) | Filtration apparatus using diatomaceous earth |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |